Babe Fusion 18 Inch #12/600 (Caroline) Hair Extensions Straight Colors 20 Pieces Ounce Gram Fusion Hair Extensions look and feel so natural since the extension strand is fused to hair using a keratin bond. Keratin is safe, hair-friendly, and durable. Your hair will have amazing 360-degree movement and you?ll have no fear of slippage. Fusion extensions are perfect for long-lasting use because they are made of 100% human Remy hair of the finest quality. Each strand comes pre-bonded and ready for use. For removing these extensions use Keratin Bond Remover that softens the bond. You can rebond the strands with fusion Rebonds, thus can be used up to 3 times. Lasts 2 to 4 months with proper care.